黄土丘陵沟壑区不同土地利用方式下土壤含水量季节动态  

Seasonal Dynamics of Soil Water Content under Different Land Use Patterns in Loess Hilly-Gully Region

作　　者：霍海霞[1] 鞠孟辰 霍军文 崔乐乐 HUO Haixia;JU Mengchen;HUO Junwen;CUI Lele(Yangling Vocational and Technical College,Yangling,Shaanxi 712100,China;Yan'an Xingshui Soil and Water Conservation Monitoring Service Co.,Ltd,Yan’an,Shaanxi 716000,China;Suide Soil and Water Conservation Scientific Experimental Station of Yellow River Water Conservancy Commission,Suide,Shaanxi 719000,China)

机构地区：[1]杨凌职业技术学院水利工程学院,陕西杨凌712100 [2]延安市兴水水土保持监测服务有限责任公司,陕西延安716000 [3]黄河水利委员会绥德水土保持科学试验站,陕西绥德719000

出　　处：《陕西农业科学》2025年第2期56-62,共7页Shaanxi Journal of Agricultural Sciences

基　　金：陕西省重点研发计划项目(2022ZDLNY02-03);杨凌职业技术学院2021年科技创新项目(ZK21-02)。

摘　　要：探究黄土丘陵沟壑区不同土地利用方式下土壤含水量季节动态,为区域土地利用和生态系统管理提供科学依据。本研究对该区域不同土地利用方式下0~200 cm土层的含水量进行了动态监测和分析。(1)不同土地利用方式下土壤含水量呈显著的季节动态和空间异质性,不同季节依次表现为夏季>秋季>冬季>春季;不同土地利用方式由高到低依次为:耕地(7.87%)>灌木林地(6.75%)>乔木林地(6.55%)>草地(6.53%)>撂荒地(6.12%)。(2)土壤含水量变异程度呈现明显的垂直分布特征,表层(0~5 cm)变异系数最大,随深度增加呈先降低后缓慢增加趋势。(3)土壤含水量垂直分布表现出季节性差异,随土层深度的增加,夏秋季节先降低后增加,冬季先增加后降低,春季呈波动性增加趋势。(4)相关性分析结果表明,土壤含水量与耕地呈显著正相关,与撂荒地、砂粒含量和电导率呈显著负相关(p<0.05)。总之,黄土丘陵沟壑区土壤含水量呈明显的季节性动态变化,且显著受到土地利用方式的影响。To investigate the seasonal dynamics of soil water content under different land use patterns in the loess hilly-gully region and provide a scientific basis for regional land use and ecosystem management,this study dynamically monitored and analyzed the water content in the 0~200 cm soil layers under different land use patterns.The results are as follows:(1)Soil water content under different land use patterns exhibited significant seasonal dynamics and spatial heterogeneity.Seasonal variations followed the order of summer>autumn>winter>spring,while soil water content across land use patterns ranked as cropland(7.87%)>shrublan d(6.75%)>arbor forest land(6.55%)>grassland(6.53%)>abandoned land(6.12%).(2)The degree of variation in soil water content showed a distinct vertical distribution.The surface layer(0~5 cm)had the highest variation coefficient,which decreased with increasing depth and then gradually increased.(3)The vertical distribution of soil water content showed seasonal differences.In summer and autumn,soil water content decreased with depth and then increased.In winter,it increased with depth and then decreased.In spring,it exhibited a fluctuating increasing trend.(4)Correlation analysis showed that the soil water content was significantly positively correlated with farmland,but significantly negatively correlated with abandoned land,sand particle content and electrical conductivity(p<0.05).In summary,soil water content in the loess hilly-gully region exhibits significant seasonal dynamics,and is significantly influenced by land use patterns.

关 键 词：丘陵沟壑区 土地利用方式 土壤含水量 季节动态 影响因素 

分 类 号：S152.7[农业科学—土壤学]